masterThesis
Avaliação de floculante natural à base de Moringa oleifera no tratamento de água produzida na indústria do petróleo: aplicação da técnica combinada floculação/flotação
Fecha
2014-07-30Registro en:
MAGALHÃES, Emilianny Rafaely Batista. Avaliação de floculante natural à base de Moringa oleifera no tratamento de água produzida na indústria do petróleo: aplicação da técnica combinada floculação/flotação. 2014. 96f. Dissertação (Mestrado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2014.
Autor
Magalhães, Emilianny Rafaely Batista
Resumen
The principal effluent in the oil industry is the produced water, which is commonly
associated to the produced oil. It presents a pronounced volume of production and it can be
reflected on the environment and society, if its discharge is unappropriated. Therefore, it is
indispensable a valuable careful to establish and maintain its management. The traditional
treatment of produced water, usualy includes both tecniques, flocculation and flotation. At
flocculation processes, there are traditional floculant agents that aren’t well specified by
tecnichal information tables and still expensive. As for the flotation process, it’s the step in
which is possible to separate the suspended particles in the effluent. The dissolved air
flotation (DAF) is a technique that has been consolidating economically and environmentally,
presenting great reliability when compared with other processes. The DAF is presented as a
process widely used in various fields of water and wastewater treatment around the globe. In
this regard, this study was aimed to evaluate the potential of an alternative natural flocculant
agent based on Moringa oleifera to reduce the amount of oil and grease (TOG) in produced
water from the oil industry by the method of flocculation/DAF. the natural flocculant agent
was evaluated by its efficacy, as well as its efficiency when compared with two commercial
flocculant agents normally used by the petroleum industry. The experiments were conducted
following an experimental design and the overall efficiencies for all flocculants were treated
through statistical calculation based on the use of STATISTICA software version 10.0.
Therefore, contour surfaces were obtained from the experimental design and were interpreted
in terms of the response variable removal efficiency TOG (total oil and greases). The plan still
allowed to obtain mathematical models for calculating the response variable in the studied
conditions. Commercial flocculants showed similar behavior, with an average overall
efficiency of 90% for oil removal, however it is the economical analysis the decisive factor to
choose one of these flocculant agents to the process. The natural alternative flocculant agent
based on Moringa oleifera showed lower separation efficiency than those of commercials one
(average 70%), on the other hand this flocculant causes less environmental impacts and it´s
less expensive